Watch the episode "My Big Fat Geek Wedding"

PDF is designed to give a perfect representation of a printed page, unfortunately most devices aren't the size of an A4 sheet. The best you can hope for is to go for something with a wide enough screen so the text is readable on "fit page to width". Ideally go for a different format that can adapt to the screen width.

Arguing about which is best pointless, it comes down to personal preference. There's too many people saying that KDE/GNOME should be the Linux desktop, it's free software, you have a choice. If you want a single desktop without any choice, use windows. I might not like your choice of desktop, but I'll fight for your right to choose it.

I'd go for C++ rather than C, you can still write straight C functions in C++ but knowing about object orientation is an advantage.

Why this obsession with making devices that imitate the technology they are replacing? They should be producing a version of the newspaper that's viewable on many devices or am I suppose to carry several devices to read different sized media?